RU2366868C2 - Explosion-proof mining steam generator - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention is intended for steam generation and can be applied in mining industry. Explosion-proof mining steam generator includes hot water pump, evaporising separator with steam exhaust valve, connection pipelines forming circulation loop, flow drag with tangential outflow, floating replenishment controller. Replenishment controller performs constant automated water supply to bottom part of evaporising separator. Flow drag is made in the form of one or more pipes connected in parallel pattern, with tangential outflow under water line. Steam generator performance is adjusted by control valve and pump performance adjustment.

EFFECT: possible adjustment and automatic maintenance of required operation mode, improved steam humidity quality.

1 dwg

Description

The invention relates to the mining industry, in particular to mine explosion-proof steam generators, and is used to moisten dust in mine workings hazardous to gas and dust.

Known mine steam generator according to the patent of the Russian Federation No. 2206819 C1, IPC F22B 27/06, publ. 06/20/03.

The mine steam generator comprises a housing, a heating element in the form of a compression chamber formed by the housing and the piston moving in it, a water supply system made in the form of a cyclic nozzle, a device for synchronizing air inlet and steam, made in the form of steam inlet and outlet valves, a camshaft of valves connected by communication through a crankshaft to a high-pressure plunger pump and a cyclic nozzle. The disadvantages of this mine steam generator are the complexity of the design and its operation, the inability to control the performance of the steam generator.

Known mine explosion-proof steam generator according to the patent of the Russian Federation No. 2039294 C1, IPC ⁶ E21F 5/00, F22B 1/00, publ. 07/09/95, adopted as a prototype.

The mine explosion-proof steam generator contains a housing with water and a heating element, a water supply and discharge system. The heating element is made in the form of a fluid coupling operating in the hydraulic brake mode, one of the disks of which is located on the same shaft with an electric motor, and the other is rigidly fixed to the hydraulic coupling housing, in which channels for supplying water and releasing steam are made. The disadvantages of this steam generator are the inability to switch to the necessary operating modes, installation and maintenance of the designated operating mode, as well as poor steam quality in terms of humidity.

The technical result of the invention is the elimination of these disadvantages, i.e. the achievement of regulation and automatic maintenance of the desired mode of operation, improving the quality of steam in humidity.

The technical result is achieved by the fact that a mine explosion-proof steam generator containing a hot water pump, an evaporator-separator with a steam outlet valve, connecting pipelines forming a circulation circuit, a hydraulic resistance made with a tangential spout, according to the invention, contains a float feed controller that provides continuous automatic feeding water to the bottom of the evaporator of the separator, the hydraulic resistance is made in the form of one or more in parallel pipelines for prison tangential spout under the water level, the steam generator capacity regulation is achieved by regulating valve and changes in pump performance.

Thanks to this constructive solution, it becomes possible to regulate and automatically maintain the desired operating mode, the degree of dryness of the steam increases.

The invention is illustrated in the drawing, which shows a diagram of a steam generator.

The mine explosion-proof steam generator contains a commercially available pump 1 for hot water with adjustable capacity, an adjustment valve 2, a hydraulic resistance 3 with a tangential spout under the water level in the evaporator-separator 4, an outlet valve 5 of steam, a float regulator 6 of the water level in the evaporator-separator and pipeline 7. Hydraulic resistance is made in the form of one or more parallel connected short pipelines, providing a given flow velocity (at least 40 m / s) and eryu pressure of water (about the nominal pump pressure).

The explosion safety of the mine steam generator is ensured by the fact that the steam generator itself is not an explosion source in its design and principle of operation, and an explosion-proof electric motor is used in the drive of the steam generator pump.

Mine explosion-proof steam generator operates as follows. The water pumped by the pump 1, passing through the hydraulic resistance 3 located in the pressure part of the circuit, is heated to the boiling point and, getting into the evaporator-separator 4 with a lower pressure, evaporates. In the evaporator-separator 4 due to the tangential direction of the jet of water formed by the bent end of the pipe 7, the flow is twisted, which leads to an effective separation of steam and water, and increases the degree of dryness of the steam. Automatic water supply to the evaporator-separator 4 due to the float regulator 6, feeding the evaporator-separator, allows, firstly, to avoid filling the evaporator-separator with water above or below the operating level, which ensures a stable steam supply, and secondly, to create a constant flow water to the lower part of the evaporator-separator in order to reduce the number of cavitation bubbles at the pump inlet. The performance control of the steam generator is achieved by valve 2 and a change in pump performance.

Thus, due to the proposed design of the mine explosion-proof steam generator, the possibility of regulation and automatic maintenance of the desired operating mode is achieved, the degree of dryness of the steam is increased.

In addition, the proposed design of a mine explosion-proof steam generator is simpler in design and operation, and the absence of moving parts in the design increases the reliability of its operation.

The operability and compliance of the output parameters of the steam generator with the specified parameters is confirmed by experimental verification.

Claims (1)

Explosion proof mine steam generator containing a hot water pump, an evaporator-separator with a steam outlet valve, connecting pipelines forming a circulation circuit, a hydraulic resistance made with a tangential spout, characterized in that it contains a float make-up regulator that provides constant automatic water supply to the bottom part of the evaporator of the separator, the hydraulic resistance is made in the form of one or more parallel connected tubes with a tangential spout under the water level, while regulating the performance of the steam generator is achieved due to the control valve and changes in pump performance.

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